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File: RandomBytes.php
<?php /* * The RandomLib library for securely generating random numbers and strings in PHP * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> * @copyright 2011 The Authors * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version Build @@version@@ */ /** * The PHP7 Random Number Source * * This uses the inbuilt PHP7 Random Bytes function * * PHP version 5.3 * * @category PHPCryptLib * @package Random * @subpackage Source * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> * @copyright 2011 The Authors * @license http://www.opensource.org/licenses/mit-license.html MIT License * * @version Build @@version@@ */ namespace RandomLib\Source; use SecurityLib\Strength; /** * The PHP7 Random Number Source * * This uses the php7 secure generator to generate high strength numbers * * @category PHPCryptLib * @package Random * @subpackage Source * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> */ class RandomBytes extends \RandomLib\AbstractSource { /** * If the source is currently available. * Reasons might be because the library is not installed * * @return bool */ public static function isSupported() { return function_exists('random_bytes'); } /** * Return an instance of Strength indicating the strength of the source * * @return Strength An instance of one of the strength classes */ public static function getStrength() { return new Strength(Strength::HIGH); } /** * Generate a random string of the specified size * * @param int $size The size of the requested random string * * @return string A string of the requested size */ public function generate($size) { if (!self::isSupported()) { return str_repeat(chr(0), $size); } return \random_bytes($size); } }